Can I unblock a blocked Facebook User?: Unblocking and blocking someone on Facebook are interesting Facebook features that allows you to stop someone from bothering you on Facebook and as well unblock them whenever you feel like. If you are using Facebook Android app to access Facebook, the option to unblock someone is also there for users. How To View Your Blocked List On Facebook.
If you want to know whether you can unblock someone on Facebook, then the answer is a capital yes but how do you block someone on Facebook?
This Facebook guide will help you!!!

When you unblock someone, that person will be able to see your posts on Facebook that you share with the public. The person won't automatically become your friend on Facebook. If you want to become friends with a person who you've unblocked, you'll need to send them a friend request.